From: Eric Biggers <ebiggers@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
x86@kernel.org, linux-um@lists.infradead.org,
linux-raid@vger.kernel.org, linux-crypto@vger.kernel.org,
linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v5 6/8] x86/fpu: Remove cpu_has_xfeatures()
Date: Thu, 10 Sep 2026 09:59:33 -0500 [thread overview]
Message-ID: <20260910145933.GB5719@quark> (raw)
In-Reply-To: <20260910142301.GAaqK9RVdjjmpwX876@fat_crate.local>
On Thu, Sep 10, 2026 at 07:23:01AM -0700, Borislav Petkov wrote:
> On Thu, Sep 10, 2026 at 10:38:01AM +0200, Peter Zijlstra wrote:
> > Boris, can you have a look? For now I'm reverting this patch locally.
>
> Yeah, I'll zap it from the x86/fpu lineup and then we can see how to fix up
> everything later.
How about just applying patches 1-5 and 7-8, and deferring the actual
removal of cpu_has_xfeatures() to the next cycle?
> I'm not entirely sure how to go about fixing this. Some seem trivial
> enough, but others, like XFEATURE_MASK_OPMASK I don't readily see a
> replacement for.
XFEATURE_MASK_OPMASK is just part of the AVX-512 state and it will be
implied by X86_FEATURE_AVX512F.
- Eric
next prev parent reply other threads:[~2026-09-10 14:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 14:57 [PATCH v5 0/8] x86: Remove cpu_has_xfeatures() and add AVX-512 xor_gen() Eric Biggers
2026-09-01 14:57 ` [PATCH v5 1/8] x86/fpu: Check for missing AVX and AVX-512 xstate bits Eric Biggers
2026-09-01 14:57 ` [PATCH v5 2/8] um: " Eric Biggers
2026-09-01 15:11 ` sashiko-bot
2026-09-01 14:57 ` [PATCH v5 3/8] crypto: x86 - Stop using cpu_has_xfeatures() Eric Biggers
2026-09-01 14:57 ` [PATCH v5 4/8] lib/crypto: x86: " Eric Biggers
2026-09-01 14:57 ` [PATCH v5 5/8] lib/crc: " Eric Biggers
2026-09-01 14:57 ` [PATCH v5 6/8] x86/fpu: Remove cpu_has_xfeatures() Eric Biggers
2026-09-10 8:38 ` Peter Zijlstra
2026-09-10 14:23 ` Borislav Petkov
2026-09-10 14:59 ` Eric Biggers [this message]
2026-09-10 15:44 ` Borislav Petkov
2026-09-01 14:57 ` [PATCH v5 7/8] xor: Remove redundant X86_FEATURE_OSXSAVE check Eric Biggers
2026-09-01 14:57 ` [PATCH v5 8/8] xor: Add AVX-512 optimized xor_gen() Eric Biggers
2026-09-02 17:11 ` [PATCH v5 0/8] x86: Remove cpu_has_xfeatures() and add AVX-512 xor_gen() Borislav Petkov
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